摘要
针对纯梁油田腐蚀严重的问题,提出水质改性缓蚀方法。通过灰色关联理论、室内静态腐蚀实验和电化学测试,分析了腐蚀主控因素,对改性剂配方进行优选,并研究了其适用性和作用机理。实验结果表明,纯梁油田腐蚀主控因素为HCO3^-。基于对HCO3^-的调控,研究得出乙二胺+D-葡萄糖酸钠复配改性剂体系,复配质量比为7∶3,质量浓度为300 mg/L,平均缓蚀率为89%,对纯梁油田采出水适用性较强。改性剂通过破坏CO2/HCO3^-弱酸性缓冲体系,降低HCO3^-浓度,降低腐蚀电位等机理降低腐蚀速率。
For the problem of serious corrosion in Chunliang Oilfield,the corrosion inhibition method by modifying water quality was proposed.Through grey relational theory,laboratory static corrosion experiment and electrochemical test,the main controlling factors of corrosion were analyzed,the formulation of modifier was optimized,and its applicability and mechanism were studied.The experimental results show that the main controlling factor of corrosion in Chunliang Oilfield is HCO3^-.Based on the regulation of HCO3^-,the compound modifier system of ethylenediamine+D-sodium gluconate was developed.The mass ratio of ethylenediamine to D-sodium gluconate is 7∶3,and the mass concentration of the compound modifier 300 mg/L.The compound modifier has good applicability to the produced water of Chunliang Oilfield,and its average corrosion inhibition rate can reach to 89%.The compound modifier can reduce the concentration of HCO3^- in the produced water and the potential of the corrosion system by destroying the CO2/HCO3^- weak acid buffer system.
作者
李继勇
赵俊桥
邵红云
任鹏举
张云芝
董浩
LI Jiyong;ZHAO Junqiao;SHAO Hongyun;REN Pengju;ZHANG Yunzhi;DONG Hao(Research Institute of Petroleum Engineering,Shengli Oilfield Branch of SINOPEC,Dongying 257000,Shandong,China;Chunliang Oil Production Plant,Shengli Oilfield Branch of SINOPEC,Dongying 256500,Shandong,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2019年第6期50-54,59,共6页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中石化科技项目“油井采出液前置改性缓蚀技术研究”(H17002-5)
关键词
水质改性
缓蚀剂
主控因素
改性剂
water quality modification
corrosion inhibitor
main controlling factors
modifier
